Self-tapping screw with secondary reinforcing structure
By setting an auxiliary self-tapping screw and a limiting mechanism on the right side of the self-tapping screw body, the problem of loosening of traditional self-tapping screws under large external forces or long-term vibration is solved, achieving a stable connection and improving the safety and service life of the structure.
Patent Information
- Application Number
- CN202520497831.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Traditional self-tapping screws are prone to loosening under large external forces or long-term vibration, affecting the long-term stability of the connection and reducing structural safety and service life.
A self-tapping screw with a secondary reinforcement structure was designed. An auxiliary self-tapping screw was set on the right side of the self-tapping screw body, and a sleeve was fitted on the outer wall of the auxiliary self-tapping screw rod. The limiting mechanism was used to limit the insertion block, thereby enhancing the connection stability.
This enables self-tapping screws to achieve a stable connection under conditions of high external force or long-term vibration, thereby improving the safety and service life of the structure.
Smart Images
Figure CN223839504U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of self-tapping screw technology, specifically a self-tapping screw with a secondary reinforcement structure. Background Technology
[0002] In modern industry and daily life, self-tapping screws are a commonly used fastener, widely used in many fields such as construction, furniture manufacturing, and electronic equipment assembly, for connecting various thin sheet materials, such as metal sheets, plastic sheets, and wood sheets.
[0003] However, traditional self-tapping screws have certain limitations in practical use. When used in environments that withstand large external forces or long-term vibrations, relying solely on the engagement of the screw's own threads with the connected parts is insufficient to ensure the long-term stability of the connection. For example, in some building structures, self-tapping screws may loosen over time and due to external environmental factors, thus affecting the overall structural safety. Even in relatively stable furniture usage scenarios, frequent opening, closing, and moving can cause the self-tapping screw connection to gradually loosen, affecting the furniture's lifespan and user experience. Therefore, we propose self-tapping screws with a secondary reinforcement structure. Utility Model Content
[0004] The purpose of this invention is to provide a self-tapping screw with a secondary reinforcement structure to address the limitations of traditional self-tapping screws mentioned in the background art in practical use. When subjected to large external forces or long-term vibration environments, relying solely on the engagement of the screw's own threads with the connected parts is insufficient to ensure long-term stability of the connection. For example, in some building structures, self-tapping screws may loosen over time due to external environmental factors, thus affecting the overall structural safety. Even in relatively stable furniture usage scenarios, frequent opening, closing, and movement can cause the self-tapping screw connection to gradually loosen, affecting the furniture's lifespan and user experience. Therefore, we propose a self-tapping screw with a secondary reinforcement structure.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A self-tapping screw with a secondary reinforcement structure includes a self-tapping screw body, an auxiliary self-tapping screw on the right side of the self-tapping screw body, a sleeve threaded onto the outer wall of the shank of the auxiliary self-tapping screw, a connecting rod fixed to the outer circumference of the sleeve near its left end, and a plug block fixed to the left side surface of the connecting rod for sliding engagement with the screw head of the self-tapping screw body, and further includes:
[0007] A limiting mechanism is provided on the top surface of the connecting rod to limit the insertion block. The limiting mechanism includes a frame with the horizontal plate end fixed to the top surface of the connecting rod, two rotating columns rotatably connected to the two vertical plate ends of the frame, a bidirectional lead screw coaxially fixed between the two rotating columns and arranged in a front-to-back configuration, two moving rods threaded to the bidirectional lead screw and shaped like an L, and a rotating roller coaxially fixed to the surface of one of the rotating columns away from the bidirectional lead screw and used to drive the bidirectional lead screw to rotate. The two moving rods are symmetrical to each other and are slidably connected to the left outer wall of the horizontal plate end of the frame. Limiting rods that are slidably inserted into the insertion block are fixed on the opposite sides of the vertical rod ends of the two moving rods.
[0008] In a preferred embodiment, the limiting mechanism further includes a turntable coaxially fixed to the surface of the rotating roller away from the bidirectional lead screw, and a lever is fixed to the outer wall of the turntable away from the bidirectional lead screw near the edge.
[0009] In a preferred embodiment, a guide groove is provided on the left outer wall of the frame horizontal plate end, and a guide block is fixed on the right surface of the moving rod horizontal bar end, which is slidably connected to the guide groove on the outer wall of the frame horizontal plate end.
[0010] In a preferred embodiment, the size of the screw groove on the top surface of the auxiliary self-tapping screw head is adapted to the size of the screw groove on the top surface of the self-tapping screw body head, and the inner circumferential wall of the sleeve is provided with an internal thread adapted to the external thread on the outer wall of the auxiliary self-tapping screw body.
[0011] In a preferred embodiment, the top surface of the self-tapping screw head is provided with a slot, and the insert block is slidably inserted into the slot on the top surface of the self-tapping screw head.
[0012] In a preferred embodiment, the longitudinal cross-sectional shape of the guide groove on the left side surface of the frame horizontal plate is convex, and the shape of the guide block is convex, which matches the shape of the guide groove on the left side surface of the frame horizontal plate.
[0013] In a preferred embodiment, the outer wall of the self-tapping screw head is provided with two through holes that communicate with the slot on its top surface. The front and rear surfaces of the insert are provided with limiting holes that correspond to the positions and sizes of the through holes on the same side of the outer wall of the self-tapping screw head. The limiting rod passes through the through holes on the same side of the outer wall of the self-tapping screw head and slides into the limiting holes on the same side of the outer wall of the insert.
[0014] In a preferred embodiment, the cross-sectional shape of the slot on the top surface of the self-tapping screw head is convex, and the shape of the insert is convex, which is adapted to the shape of the slot on the top surface of the self-tapping screw head.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. This utility model provides an auxiliary self-tapping screw on the right side of the self-tapping screw body, and a sleeve is threaded on the outer wall of the auxiliary self-tapping screw rod. The sleeve is connected to a plug fixed on its left side through a connecting rod. The plug is slidably inserted into the screw head of the self-tapping screw body, which realizes the convenient connection between the auxiliary self-tapping screw and the self-tapping screw body, and achieves the effect of providing a secondary reinforcement foundation structure for the self-tapping screw body.
[0017] 2. This utility model sets a limiting mechanism on the top surface of the connecting rod. The frame, rotating column, bidirectional screw, moving rod, limiting rod, rotating roller and other components in the limiting mechanism cooperate with each other. Rotating the rotating roller can drive the bidirectional screw to rotate, thereby causing the two moving rods to drive the limiting rod to move, thus realizing the limiting and fixing of the connection between the insert block and the screw head of the self-tapping screw body, and achieving the effect of enhancing the stability of the connection between the auxiliary self-tapping screw and the self-tapping screw body.
[0018] 3. This utility model improves the ease of operation and ensures the stability and adaptability of the structure by setting up a turntable and lever in the limiting mechanism, as well as cooperating with the guide groove on the outer wall of the left side of the frame horizontal plate and the guide block on the right side of the moving rod horizontal bar, and setting up slot shapes that match the screw head of the self-tapping screw body and the plug, and screw slot sizes that match the auxiliary self-tapping screw body. It achieves the effect of facilitating user operation, adapting to different usage scenarios, and improving overall practicality. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is one of the exploded views of this utility model;
[0021] Figure 3 This is the second partially exploded view of this utility model;
[0022] Figure 4 This is a schematic diagram of the overall structure of the limiting mechanism in this utility model;
[0023] Figure 5 This is one of the exploded partial views of the limiting mechanism in this utility model;
[0024] Figure 6 This is the second partially exploded view of the limiting mechanism in this utility model;
[0025] The meanings of the labels in the diagram are as follows:
[0026] 1. Self-tapping screw body; 2. Socket; 3. Connecting rod; 4. Insert block; 5. Auxiliary self-tapping screw; 6. Limiting mechanism; 61. Frame; 62. Rotating column; 63. Two-way lead screw; 64. Moving rod; 65. Guide block; 66. Limiting rod; 67. Rotating roller; 68. Turntable; 69. Pulley. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figures 1-6 This utility model provides a technical solution: a self-tapping screw with a secondary reinforcement structure, including a self-tapping screw body 1, an auxiliary self-tapping screw 5 on the right side of the self-tapping screw body 1, a sleeve 2 threaded on the outer wall of the shank of the auxiliary self-tapping screw 5, a connecting rod 3 fixed near the left end of the circumferential outer wall of the sleeve 2, and a plug 4 fixed on the left side surface of the connecting rod 3 for sliding engagement with the screw head of the self-tapping screw body 1, and further including:
[0029] The limiting mechanism 6, located on the top surface of the connecting rod 3, is used to limit the insertion block 4. The limiting mechanism 6 includes a frame 61 with its horizontal end fixed to the top surface of the connecting rod 3; two rotating columns 62 rotatably connected to the two vertical ends of the frame 61; a bidirectional lead screw 63 coaxially fixed between the two rotating columns 62 and arranged front-to-back; two moving rods 64 threaded to the bidirectional lead screw 63 and shaped like an L; and a rotating roller 67 coaxially fixed to the surface of one of the rotating columns 62 on the side away from the bidirectional lead screw 63, used to drive the bidirectional lead screw 63 to rotate. The two moving rods 64 are symmetrical to each other. Both are slidably connected to the left outer wall of the horizontal plate end of the frame 61. The opposing sides of the vertical ends of the two moving rods 64 are fixed with limiting rods 66 that are slidably inserted into the insert block 4. By setting an auxiliary self-tapping screw 5 on the right side of the self-tapping screw body 1, a sleeve 2 is threaded on the outer wall of the auxiliary self-tapping screw 5 rod. A connecting rod 3 is fixed near the left end of the outer circumference of the sleeve 2. The insert block 4 is fixed on the left side surface of the connecting rod 3, and the insert block 4 is slidably inserted into the screw head of the self-tapping screw body 1, so that the auxiliary self-tapping screw 5 can be easily connected to the self-tapping screw body 1, providing a secondary reinforcement base structure for the self-tapping screw body 1.
[0030] In this embodiment, the limiting mechanism 6 also includes a turntable 68 coaxially fixed on the surface of the rotating roller 67 away from the bidirectional lead screw 63, and a lever 69 is fixed near the edge of the outer wall of the turntable 68 away from the bidirectional lead screw 63, so that the operator can rotate the rotating roller 67 more conveniently, thereby driving the bidirectional lead screw 63 to rotate more easily and improving the convenience of operation.
[0031] In addition, a guide groove is provided on the left outer wall of the horizontal plate end of the frame 61, and a guide block 65 is fixed on the right surface of the horizontal bar end of the moving rod 64, which is slidably connected to the guide groove on the outer wall of the horizontal plate end of the frame 61. This makes the moving rod 64 more stable when it moves at the horizontal plate end of the frame 61, and ensures that the limiting rod 66 can accurately limit the insertion block 4.
[0032] Furthermore, the size of the screw groove on the top surface of the auxiliary self-tapping screw 5 is compatible with the size of the screw groove on the top surface of the screw head of the self-tapping screw body 1, and the inner circumference of the sleeve 2 is provided with an internal thread that is compatible with the external thread on the outer wall of the auxiliary self-tapping screw 5 rod, so that the auxiliary self-tapping screw 5 and the self-tapping screw body 1 are more compatible during connection and use, and the stability and adaptability of the overall structure are enhanced.
[0033] Specifically, the top surface of the screw head of the self-tapping screw body 1 is provided with a slot, and the insert 4 slides into the slot on the top surface of the screw head of the self-tapping screw body 1, realizing the convenient connection between the insert 4 and the screw head of the self-tapping screw body 1, and providing a basis for the subsequent limiting mechanism 6 to limit the insert 4.
[0034] It is worth noting that the longitudinal cross-sectional shape of the guide groove on the left side surface of the horizontal plate end of the frame 61 is convex, and the shape of the guide block 65 is convex, which matches the shape of the guide groove on the left side surface of the horizontal plate end of the frame 61. When the guide block 65 slides in the guide groove, it can not only ensure the direction of movement of the moving rod 64, but also prevent the moving rod 64 from shaking or falling out of the guide groove during movement, thus further improving the stability of the limiting mechanism 6.
[0035] It is worth noting that the outer wall of the screw head of the self-tapping screw body 1 is provided with two through holes that are connected to the slot on its top surface. The front and rear surfaces of the insert block 4 are provided with limiting holes that correspond to the positions and sizes of the through holes on the outer wall of the screw head of the self-tapping screw body 1. The limiting rod 66 passes through the through hole on the outer wall of the screw head of the self-tapping screw body 1 and slides into the limiting hole on the outer wall of the insert block 4, so that the limiting rod 66 can effectively limit the position of the insert block 4, thereby enhancing the stability of the connection between the auxiliary self-tapping screw 5 and the self-tapping screw body 1.
[0036] It is worth emphasizing that the cross-sectional shape of the slot on the top surface of the screw head of the self-tapping screw body 1 is convex, and the shape of the insert 4 is convex, which matches the shape of the slot on the top surface of the screw head of the self-tapping screw body 1. This makes the connection between the insert 4 and the slot tighter and more stable, prevents the insert 4 from shifting laterally in the slot, and improves the reliability of the connection between the auxiliary self-tapping screw 5 and the self-tapping screw body 1.
[0037] In this embodiment, during actual use, the self-tapping screw body 1 is first installed on the plate. The screw body 1 is screwed into the plate using its own thread characteristics to complete the initial fixation. Then, a secondary reinforcement is carried out. The auxiliary self-tapping screw 5 interacts with the internal thread on the inner wall of the sleeve 2 through the external thread on its shank, so that the auxiliary self-tapping screw 5 can be screwed in or out relative to the sleeve 2. The connecting rod 3 fixed near the left end of the outer wall of the sleeve 2 serves to connect the sleeve 2 and the insert 4. The insert 4 is aligned with the slot on the top of the screw head of the self-tapping screw body 1 and slid in, laying the foundation for subsequent positioning and the coordinated work of the auxiliary self-tapping screw 5 and the self-tapping screw body 1.
[0038] When it is necessary to limit the insertion block 4 to ensure a stable connection between the auxiliary self-tapping screw 5 and the self-tapping screw body 1, the limiting mechanism 6 is operated. By rotating the lever 69, the turntable 68 can be driven to rotate. The rotation of the turntable 68 drives the rotating roller 67, which is coaxially fixed with it, to rotate. Since the rotating roller 67 is coaxially fixed with one of the rotating columns 62, the rotation of the rotating roller 67 drives the rotating column 62 to rotate. The rotating column 62 is coaxially fixed with the bidirectional lead screw 63, thereby causing the bidirectional lead screw 63 to rotate synchronously. The bidirectional lead screw 63 is threadedly connected to two mutually symmetrical L-shaped moving rods 64. When the bidirectional lead screw 63 rotates, according to its thread characteristics, the two moving rods 64 will move in opposite directions along the left outer wall of the horizontal plate end of the frame 61. The guide block 65, fixed on the right side of the horizontal end of the moving rod 64, slides in the guide groove on the left outer wall of the horizontal plate end of the frame 61, ensuring the accuracy and stability of the moving rod 64's movement direction. As the moving rod 64 moves, the limiting rod 66, fixed on the opposite side of its vertical end, also moves. When the rotating roller 67 moves the limiting rod 66 to a position corresponding to the through hole on the outer wall of the self-tapping screw body 1 and the limiting hole on the outer wall of the insert 4, the limiting rod 66 passes through the through hole on the same side of the outer wall of the self-tapping screw body 1 and slides into the limiting hole on the same side of the outer wall of the insert 4, thereby limiting the insertion block 4 and firmly connecting the auxiliary self-tapping screw 5 to the self-tapping screw body 1.
[0039] Finally, the auxiliary self-tapping screw 5 is screwed into the board. At this time, the auxiliary self-tapping screw 5 and the self-tapping screw body 1 already installed on the board work together to complete the secondary reinforcement of the board connection. At the same time, the slot on the top surface of the screw head of the self-tapping screw body 1 and the convex cross-sectional shape of the insert 4 ensure that the insert 4 is tightly connected to the slot and prevents lateral displacement. The guide groove on the left side surface of the horizontal plate end of the frame 61 and the convex longitudinal cross-sectional shape of the guide block 65 further ensure the stability and reliability of the movement of the moving rod 64 when the limit mechanism 6 is working, and finally realize the efficient and stable operation of the entire self-tapping screw with secondary reinforcement structure.
[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A self-tapping screw with a secondary reinforcement structure, comprising a self-tapping screw body (1), characterized in that, An auxiliary self-tapping screw (5) is provided on the right side of the self-tapping screw body (1). A sleeve (2) is threaded onto the outer wall of the shank of the auxiliary self-tapping screw (5). A connecting rod (3) is fixed to the outer circumference of the sleeve (2) near the left end. A plug (4) is fixed to the left side surface of the connecting rod (3) and slides into the screw head of the self-tapping screw body (1). The auxiliary self-tapping screw (5) also includes: A limiting mechanism (6) is set on the top surface of the connecting rod (3) to limit the insertion block (4). The limiting mechanism (6) includes a frame (61) with the horizontal plate end fixed on the top surface of the connecting rod (3), two rotating columns (62) rotatably connected to the two vertical plate ends of the frame (61), a bidirectional lead screw (63) coaxially fixed between the two rotating columns (62) and arranged in a front-to-back manner, two moving rods (64) threadedly connected to the bidirectional lead screw (63) and in an L-shape, and a rotating roller (67) coaxially fixed on the surface of one of the rotating columns (62) away from the bidirectional lead screw (63) and used to drive the bidirectional lead screw (63) to rotate. The two moving rods (64) are symmetrical to each other and are slidably connected to the left outer wall of the horizontal plate end of the frame (61). The opposing surfaces of the vertical rod ends of the two moving rods (64) are fixed with limiting rods (66) that are slidably inserted into the insertion block (4).
2. The self-tapping screw with secondary reinforcement structure according to claim 1, characterized in that: The limiting mechanism (6) further includes a turntable (68) coaxially fixed on the surface of the roller (67) away from the bidirectional lead screw (63), and a lever (69) is fixed on the outer wall of the turntable (68) away from the bidirectional lead screw (63) near the edge.
3. The self-tapping screw with secondary reinforcement structure according to claim 1, characterized in that: The left outer wall of the horizontal plate end of the frame (61) is provided with a guide groove, and the right surface of the horizontal bar end of the moving rod (64) is fixed with a guide block (65) that is slidably connected to the guide groove on the outer wall of the horizontal plate end of the frame (61).
4. The self-tapping screw with secondary reinforcement structure according to claim 1, characterized in that: The size of the screw groove on the top surface of the auxiliary self-tapping screw (5) is compatible with the size of the screw groove on the top surface of the screw head of the self-tapping screw body (1), and the inner circumference of the sleeve (2) is provided with an internal thread that is compatible with the external thread on the outer wall of the auxiliary self-tapping screw (5).
5. The self-tapping screw with secondary reinforcement structure according to claim 1, characterized in that: The top surface of the screw head of the self-tapping screw body (1) is provided with a slot, and the insert (4) is slidably inserted into the slot on the top surface of the screw head of the self-tapping screw body (1).
6. The self-tapping screw with secondary reinforcement structure according to claim 3, characterized in that: The longitudinal cross-sectional shape of the guide groove on the left side of the horizontal plate end of the frame (61) is convex, and the shape of the guide block (65) is convex, which is adapted to the shape of the guide groove on the left side of the horizontal plate end of the frame (61).
7. The self-tapping screw with secondary reinforcement structure according to claim 5, characterized in that: The self-tapping screw body (1) has two through holes on the outer wall of the screw head that are connected to the slot on its top surface. The front and rear surfaces of the insert block (4) are provided with limiting holes that correspond to the positions and sizes of the through holes on the outer wall of the self-tapping screw body (1) and are adapted to each other. The limiting rod (66) passes through the through holes on the outer wall of the self-tapping screw body (1) and slides into the limiting holes on the outer wall of the insert block (4).
8. The self-tapping screw with secondary reinforcement structure according to claim 5, characterized in that: The transverse cross-sectional shape of the slot on the top surface of the self-tapping screw body (1) is convex, and the shape of the insert (4) is convex, which is adapted to the shape of the slot on the top surface of the self-tapping screw body (1).